Observed time difference of arrival based position estimation for LTE systems: simulation framework and performance evaluation

Alhafid, A.; Younis, S.

doi:10.15587/1729-4061.2020.201382

Cited by 3 publications

(2 citation statements)

References 16 publications

(50 reference statements)

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“…In the functional analysis of the system, this paper shows that it meets the needs of performance management, that is, to achieve all the functions that enterprise performance management needs to include. User requirements are some of the additional requirements that users need for the system to be convenient for their own use in addition to the basic functions that the system solves for the actual work content [13,14]. Its functional flow diagram is shown in Figure 3.…”

Section: System Functionsmentioning

confidence: 99%

Visualization of the Digital Enterprise Performance Management System Integrating the Simulated Annealing Algorithm

Zhang

2022

Mathematical Problems in Engineering

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Enterprises conduct performance management through performance management systems, which can greatly improve work efficiency and quality. The win-win of human resources and time resources has been realized, making the assessment fair and objective. At present, the application of performance management to digitalization is becoming more and more intense. This paper proposes to use the optimization of the simulated annealing algorithm to help the research of the enterprise performance management system. It is helpful to analyze and solve some negative factors brought by the current traditional enterprise performance management system, so that the employees of the enterprise have higher satisfaction in the performance, and the enterprise can have more far-reaching development goals. In the subsequent survey of employee satisfaction with the enterprise performance management system, the results show that after the implementation of performance management reform, the recognition of performance management by enterprise managers and employees has increased significantly. Among the returned questionnaires, 3360 people expressed great satisfaction, and the proportion increased from 32.69% to 63.62%, almost doubling. A total of 4259 people expressed great satisfaction and satisfaction, the proportion increased from 70.08% to 87.35%. A total of 1021 people expressed dissatisfaction and very dissatisfaction, the proportion dropped from 29.92% to 12.65%. Therefore, this survey result shows that the visual analysis of the digital enterprise performance management system and its application in the operation of the enterprise is very important.

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Section: System Functionsmentioning

confidence: 99%

Visualization of the Digital Enterprise Performance Management System Integrating the Simulated Annealing Algorithm

Zhang

2022

Mathematical Problems in Engineering

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“…I n the future generation of communication systems, location awareness will be essential due to the great spread of intelligent applications such as internet-of-things, autonomous vehicles, unmanned aerial vehicles, and self-navigation robots [1,2]. In communication systems with high carrier frequency, such as 6G, the line-of-sight (LoS) links are easily blocked by obstruction.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Far-field Localization Scheme Using Multi-RIS and Efficient Beam Sweeping

Alhafid,

Younis,

Ali

2024

PIER C

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Future 6G networks are anticipated to use reconfigurable intelligent surfaces (RISs) because of their capability to expand coverage, provide a customizable wireless environment, increase localization accuracy, etc. In this paper, RIS-aided localization is considered with orthogonal frequency division multiplexing (OFDM) and single-input single-output (SISO) downlink system in millimeterwave (mmWave). An efficient beam sweeping (EBS) scheme is proposed accomplished by an RIS to scan the area of interest and estimate the direction of the user equipment (UE), i.e., the signal's angle of departure (AoD). The AoD with the measured signal time of arrival (ToA), from the RIS to the UE, is used to estimate the UE position. The ToA measurements can be obtained by exploiting the OFDM signal, while the beam sweeping can be obtained by carefully designing the RIS phase profile. The first step of the proposed EBS scheme is to scan the whole area of interest with equally spaced beam angles for coarse estimation of AoD. Then, based on this estimation, the RIS is reconfigured to sweep a slight angle's range by narrow beams to refine the AoD estimation. Besides, a multi-RIS scenario is proposed, and leveraging the EBS and the consensus fusion method is used to obtain accurate position estimation. Simulation results demonstrate that the proposed EBS in single and multi-RIS scenarios enhances positioning accuracy compared to linear beam sweeping (LBS) methods. Also, the impact of increasing the number of RIS elements and number of sweeping beams, as well as the number of RISs, is investigated thoroughly via numerical simulations. Furthermore, the achievable localization accuracy is assessed using the positioning error bound (PEB).

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Efficient near-field localization aided with reconfigurable intelligent surface using geometric dilution of precision

Alhafid,

Younis,

Mohammed Ali

2023

Journal of Information and Telecommunication

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Observed time difference of arrival based position estimation for LTE systems: simulation framework and performance evaluation

Cited by 3 publications

References 16 publications

Visualization of the Digital Enterprise Performance Management System Integrating the Simulated Annealing Algorithm

Visualization of the Digital Enterprise Performance Management System Integrating the Simulated Annealing Algorithm

Enhanced Far-field Localization Scheme Using Multi-RIS and Efficient Beam Sweeping

Efficient near-field localization aided with reconfigurable intelligent surface using geometric dilution of precision

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